<template>
  <div style="padding:20px">
    <el-button type="primary" icon="upload" @click="handleImport">导入</el-button>
    <el-button type="Search" icon="download" @click="handleExport">导出</el-button>
  </div>
  <div>
    <el-table
        :data="categoryList"
        style="width: 100%"
        row-key="id"
        border
        lazy
        :load="load"
        :tree-props="{ children: 'children', hasChildren: 'hasChildren' }"
    >
      <el-table-column prop="name" label="分类名称"></el-table-column>
      <el-table-column prop="imageUrl" label="图标">
        <template #default="scope">
          <img v-if="scope.row.imageUrl" :src="scope.row.imageUrl" alt="" style="width: 35px;height: 35px">
        </template>
      </el-table-column>
      <el-table-column prop="orderNum" label="排序"></el-table-column>
      <el-table-column prop="status" label="状态"></el-table-column>
      <el-table-column prop="creatTime" label="创建时间"></el-table-column>


    </el-table>

  </div>
  <el-dialog :title="upload.title" v-model="upload.open" width="400px" append-to-body>
    <el-upload
        ref="uploadRef"
        :limit="1"
        accept=".xlsx, .xls"
        :headers="upload.headers"
        :action="upload.url + '?updateSupport=' + upload.updateSupport"
        :disabled="upload.isUploading"
        :on-progress="handleFileUploadProgress"
        :on-success="handleFileSuccess"
        :auto-upload="false"
        drag
    >
      <el-icon class="el-icon--upload"><upload-filled /></el-icon>
      <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
      <template #tip>
        <div class="el-upload__tip text-center">
          <div class="el-upload__tip">
            <el-checkbox v-model="upload.updateSupport" />是否更新已经存在的用户数据
          </div>
          <span>仅允许导入xls、xlsx格式文件。</span>
          <el-link type="primary" :underline="false" style="font-size:12px;vertical-align: baseline;" @click="importTemplate">下载模板</el-link>
        </div>
      </template>
    </el-upload>
    <template #footer>
      <div class="dialog-footer">
        <el-button type="primary" @click="submitFileForm">确 定</el-button>
        <el-button @click="upload.open = false">取 消</el-button>
      </div>
    </template>
  </el-dialog>
</template>

<script setup>
import {listCategoryByPid} from '@/api/product/category'
import {getCurrentInstance} from "vue";

const categoryList = ref([])
onMounted(() => {
  initPagedata()
})
const initPagedata = async () => {
  const {data} = await listCategoryByPid(0)
  categoryList.value = data

}
const load = async (row, treeNode, resolve) => {
  //1、查询点击按钮下一级分类数据列表
  //console.log(row.id,row.name)
  const {data} = await listCategoryByPid(row.id)
  //2、将查询到的下一级数据 解析到treeNode的下一级展示
  resolve(data)
}
//3 导出
let{proxy} = getCurrentInstance()
function handleExport(){
  proxy.download('/product/category/export',{},`category_${new Date().getTime()}.xlsx`)
}
//4 导入
import { getToken } from "@/utils/auth";

/*** 分类导入参数 */
const upload = reactive({
  // 是否显示弹出层（用户导入）
  open: false,
  // 弹出层标题（用户导入）
  title: "",
  // 是否禁用上传
  isUploading: false,
  // 是否更新已经存在的用户数据
  updateSupport: 0,
  // 设置上传的请求头部
  headers: { Authorization: "Bearer " + getToken() },
  // 上传的地址
  url: import.meta.env.VITE_APP_BASE_API + "/product/category/import"
});

/** 导入按钮操作 */
function handleImport() {
  upload.title = "用户导入";
  upload.open = true;
}
/** 下载模板操作 */
function importTemplate() {
  proxy.download("product/category/importTemplate", {
  }, `category_template_${new Date().getTime()}.xlsx`);
};
// 文件上传中处理
function handleFileUploadProgress(event, file, fileList) {
  upload.isUploading = true;
}

// 文件上传成功处理
const handleFileSuccess = (response, file, fileList) => {
  upload.open = false;
  upload.isUploading = false;
  proxy.$refs["uploadRef"].handleRemove(file);
  proxy.$alert("<div style='overflow: auto;overflow-x: hidden;max-height: 70vh;padding: 10px 20px 0;'>" + response.msg + "</div>", "导入结果", { dangerouslyUseHTMLString: true });
  getList(0);
};
// 提交上传文件
function submitFileForm() {
  proxy.$refs["uploadRef"].submit();
}

</script>
